(PHP 5 >= 5.3.0, PHP 7) Convert a 8 bit string to a quoted-printable string

(PHP 5 >= 5.3.0, PHP 7) Parse a CSV string into an array

(PHP 4, PHP 5) Case insensitive regular expression match

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Pad a string to a certain length with another string

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Formats a number as a currency string

(PHP 4, PHP 5, PHP 7) Find the position of the last occurrence of a substring in a string

(PHP 4, PHP 5, PHP 7) Return information about characters used in a string

(PHP 4, PHP 5, PHP 7) Return part of a string

(PECL ssdeep >= 1.0.0) Create a fuzzy hash from a string

(PHP 4, PHP 5, PHP 7) Uppercase the first character of each word in a string